Alfred n



(No Model.) A. N. PARNALL. PIPE -WRE NCH.

No. 486,235. Patented Nov. 15, 1892.

TN: Noam: mns ca.; PNoTauYuo.. WASHING-ron, U. c.

UNITED' STATES PATENT OFFICE.

ALFRED N. PARNALL, OF ERIE, PENNSYLVANIA, ASSIGNOR TO THE LANDSMANUFACTURING COMPANY, OF SAME PLACE.

PIPE-WRENCH.

SPECIFECATION forming part of Letters PatentrNo. 486,23-5, datedNovember 15, 1892.

Application filed May 13l 1892. Serial No. 432,940. (No model.)

.To a/ZZ whom t may concern:

Be it known that I, ALFRED N. PARNALL, a citizen of the United States,residing at Erie, in the county of Erie and State of Pennsylvania, haveinvented certain new and useful Improvements in Pipe-Wrenches; and I dohereby declare the following to be a full, clear, and exact descriptionof the invention, such as will enable others skilled in the art to whichit appertains to make and use the same, reference being had totheaccompanying drawings, and to the letters of reference markedthereon, forming part of this specification.

My invention consists in the improvement in pipe-wrenches hereinafterset forth and explained, and illustrated in the accompanying drawings,in which- Figure l is a view in side elevation of my improvedpipe-wrench. Fig. 2 is a rear view in elevation 0f the same.

In the construction of my improved pipewrench A is the body of theWrench, constructed with alligator-jaws O C', forming a V-shaped bearingin the end thereof to receive a pipe B. These jaws C C are provided witha transverse slot D, which extends through the outer ends of both thejaws C and C and extends downward in the jaw C, so as to form a bearingin which a movable hook E is pivoted by means of a pin F. This hook ismade cam-shaped and is provided on its inner face with serratedrearwardly-projecting teeth e, adapted to engage with the surface of asection of pipe B, placed between the jaws C C', and as the pivot F uponwhich the hook swings is considerably to the rear of and somewhat to oneside of the center of the V-shaped bearing between the jaws C C anymovement of the handle G of the wrench in the direction of the arrowoperates to force the teeth e of the hook E sharply against the pipe andprevents it turning in the V-shaped bearing between the jaws C and C',while the reverse movement of the handle G permits the teeth e to passover the surface of the pipe B easily in the opposite direction. Thetransverse slot D in the jaws C C also permits the hook E to closeinward sufficiently to engage with a very small pipe when desired asreadily as itI will with a larger pipe, thus adaptingit for use on pipesconsiderably varying in size.

Having thus fully described my invention, so as to enable-others toconstruct and use the saine, what I claim as new, and desire to secureby Letters Patent of the United States, 1s-

The combination, in a pipe-wrench, 0f a handle having alligator orV-shaped jaws C C rigidly secured tothe end thereof and having a slot Din one of said jaws, with a camshaped hook E pivoted in the slot D andhaving rearwardly-projecting teeth e on the inner surface thereof,substantially as and for the purpose set forth.

In testimony whereof Iaiiix my signature in presence of two witnesses.

ALFRED N. PARNALL.

Witnesses:

R. B. HOUGH, C. OBEIEN.

